Baby Stroller

ABSTRACT

A baby stroller is formed by a stroller frame and a chair, and the stroller frame includes a rotatable base. When the baby stroller is unfolded, the base is provided for abutting the stroller frame and positioned automatically, and when the baby stroller is folded, the chair and the stroller frame are folded and positioned directly together with the rotation of the base. The chair includes a folding joint, such that the chair can be folded directly onto the stroller frame to provide a simple, easy and quick operation and to achieve the effect of reducing the storage volume of the baby stroller.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a baby stroller, and more particularlyto the baby stroller that can be folded together with a chair directlyto provide a simple, easy and quick operation, and the chair can befolded onto a stroller frame directly to reduce the storage volume ofthe baby stroller.

2. Description of the Related Art With reference to FIGS. 1 to 3 for aconventional baby stroller, the baby stroller comprises a stroller framehaving an independent seat base 1 and a baby seat 10 sheathed andmounted on the seat base and capable of changing a direction of the seat10 simply and quickly. However, the seat 10 is protruded from thestroller frame, so that when the baby stroller is folded, the size(which refers to the folding volume) is too large (or too high) as shownin FIG. 4, and the too-large size or volume causes inconvenience to thetransportation or carrying of the baby stroller. If the seat 10 istilted backward (as shown in FIG. 3), the seat 10 will interfere withthe stroller frame, and thus the baby stroller cannot be foldeddirectly, and it is necessary to remove the seat 10 before folding thebaby stroller. Obviously, such operation not only involves a complicatedprocedure, but also requires separating the stroller frame and the seat10 before folding the baby stroller, so that parts may be lost ormissing easily and the transportation and carrying of the baby strollerbecomes inconvenient.

SUMMARY OF THE INVENTION

Therefore, it is a primary objective of the present invention to providea baby stroller that can be folded together with a chair directly toprovide a simple, easy and quick operation.

Another objective of the present invention is to provide a chair thatcan be folded onto a stroller frame directly to reduce the storagevolume of the baby stroller.

To achieve the foregoing objectives, the present invention provides ababy stroller comprising an independent stroller frame and a chair,wherein the stroller frame comprises a rotatable base, such that whenthe baby stroller is unfolded, the base abuts and positions the strollerframe automatically, and when the baby stroller is folded, the chair isrotated together with the base, such that the chair can be folded andpositioned together with the stroller frame directly.

In addition, the chair of the present invention includes a foldingjoint, so that the chair can be folded onto the stroller frame directlyto provide a simple, easy and quick operation and achieve the effect ofreducing the storage volume of the baby stroller.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of disassembled parts of a conventionalbaby stroller;

FIG. 2 is a perspective view of a conventional baby stroller;

FIG. 3 is another perspective view of a conventional baby stroller;

FIG. 4 is a side view of folding a conventional baby stroller;

FIG. 5 is a perspective view of dissembled parts of the presentinvention;

FIG. 6 is an exploded view of a positioning element of the presentinvention;

FIG. 7 is a side view of unfolding a baby stroller of the presentinvention;

FIG. 8 is another side view of unfolding a baby stroller of the presentinvention;

FIG. 9 is a side view of a stroller frame when unfolding a baby strollerof the present invention;

FIG. 10 is a side view of folding a baby stroller of the presentinvention;

FIG. 11 is another side view of folding a baby stroller of the presentinvention;

FIG. 12 is a side view of a stroller frame when folding a baby strollerof the present invention;

FIG. 13 is an exploded view of a positioning element in accordance withanother preferred embodiment of the present invention;

FIG. 14 is a schematic view of a positioning element when unfolding ababy stroller in accordance with another preferred embodiment of thepresent invention;

FIG. 15 is a schematic view of a positioning element when folding a babystroller in accordance with another preferred embodiment of the presentinvention;

FIG. 16 is a perspective view of a chair of the present invention;

FIG. 17 is an exploded view of a chair folding joint of the presentinvention;

FIG. 18 is a schematic view of a chair folding joint in a locked statein accordance with the present invention;

FIG. 19 is another schematic view of a chair folding joint in a lockedstate in accordance with the present invention;

FIG. 20 is a schematic view of a chair folding joint in an unlockedstate in accordance with the present invention;

FIG. 21 is another schematic view of a chair folding joint in anunlocked state in accordance with the present invention;

FIG. 22 is a side view of a chair when folding a baby stroller inaccordance with the present invention;

FIG. 23 is an exploded view of a chair folding joint in accordance withanother preferred embodiment of the present invention;

FIG. 24 is a schematic view of a chair folding joint in a locked statein accordance with another preferred embodiment of the presentinvention;

FIG. 25 is another schematic view of a chair folding joint in a lockedstate in accordance with another preferred embodiment of the presentinvention;

FIG. 26 is a schematic view of a chair folding joint in an unlockedstate in accordance with another preferred embodiment of the presentinvention; and

FIG. 27 is another schematic view of a chair folding joint in anunlocked state in accordance with another preferred embodiment of thepresent invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The technical characteristics, structures and effects of the presentinvention will become apparent with the detailed description of twopreferred embodiments together with the illustration of related drawingsas follows.

With reference to FIGS. 5 to 8, the baby stroller of the presentinvention comprises an independent stroller frame 2 having upper andlower tubes 21, 22, a rear wheel frame 23 and a joint 24; a base 3,fixed to the stroller frame 2 (or the joint 24) by a fixing element 31(such as a bolt), and freely rotatable, and having a positioning element32 installed on an external side at an upper end of the base 3, whereinthe positioning element 32 can be a semicircular arc shaped stop block;and an independent chair 4, having a latch seat 40 latched to the base 3to mount a chair 4 onto the stroller frame 2.

When the baby stroller is unfolded, the positioning element 32 of thebase 3 abuts and fixes the stroller frame 2 when unfolding the strollerframe 2 as shown in FIGS. 7 to 9. On the other hand, if a user wants tofold the baby stroller, the user simply turns the stroller frame 2downwardly and inwardly to fold and fix the stroller frame 2 togetherwith the chair 4 by the rotatable feature of the base 3, withoutremoving the chair 4 as shown in FIGS. 10 and 11. Of course, the usercan selectively remove the chair 4 first and then fold the strollerframe 2 as shown in FIGS. 9 and 12.

In short, the present invention mainly installs a rotatable base 3 onthe stroller frame 2, so that when the baby stroller is unfolded, thebase 3 abuts the stroller frame 2 to position the stroller frame 2automatically; and when the baby stroller is folded, the freelyrotatable feature of the base 3 can be used to fold and position thechair 4 together with the stroller frame 2 directly.

From the description above, the present invention has one or more of thefollowing advantages and effects, and obviously improves over the priorart.

1. The direction of the chair 4 can be changed simply and quickly.

2. The chair 4 can be folded onto the stroller frame directly, not onlyovercoming the problem of the conventional baby stroller that cannot befolded without removing the seat, but also simplifying the procedure offolding the baby stroller and provides a simple, easy and quickoperation.

3. The chair 4 can be folded onto the stroller frame directly to avoidseparating the chair 4 and the stroller frame 2 or prevent missingcomponents.

With reference to FIGS. 13 to 15, a joint 24 of the present inventioncomprises two joint covers 51, secured by a fixing element 31 and fixedto the base 3; an upper link plate 52, installed in the joint cover 51,and coupled to the upper tube 21, and having a bump 53; and a lower linkplate 55, installed in the joint cover 51, and coupled to the lower tube22, and having a stop body 56 corresponding to the upper link plate 52.

When the baby stroller is unfolded, the positioning element 32 of thebase 3 stops the bump 53 and the stop body 56 of the upper and lowerlink plates 52, 53, so that when the stroller frame 2 (which includesthe upper and lower tubes 21, 22) is unfolded, the stroller frame 2 canbe positioned automatically as shown in FIG. 14. On the other hand, ifthe user wants to unfold the baby stroller, the user simply turns thestroller frame 2 downwardly and inwardly, so that the upper and lowerlink plates 52, 55 are rotated to obtain the folding and positioningeffects as shown in FIG. 15, so as to achieve the same effect of theforegoing preferred embodiment.

To further reduce the storage volume when folding the baby stroller. thepresent invention further comprises a folding joint 6 installed onto thechair 4 as shown in FIGS. 16 and 17, wherein the chair 4 comprises afabric seat 41 and upper and lower tubes 42, 43 mounted onto the seat41, and the folding joint 6 is installed between the upper and lowertubes 42, 43 of the seat 41 and comprises: an upper joint 61, fixed tothe bottom of the upper tube 42 of the seat 41, and having a notch 611formed on an external side of the upper seat 61; two fixing members 62,installed in a notch 611 through a spring 621, so that the fixing member62 is always maintained at an upwardly disposed state; a press plate 63,installed on an external side of the upper joint 61, and having a breach63 corresponding to the fixing member 62; a lower joint 64, fixed at anupper end of the lower tube 43 of the seat 41 and integrated with alatch seat 40, and having a corresponding positioning slot 641 formed onan internal side of the lower joint 64 (as shown in FIG. 18) andcorresponding to the two fixing members 62, and the upper and lowerjoints 61, 64 and a fixing element 65 (such as a rivet) are provided fora fixing effect to position the fixing members 62 and press plate 63therein; a press button 66, installed outside the upper tube 42 of theseat 41 and having a slide member 67 coupled to the bottom of the pressbutton 66, and disposed in a slide slot 421 of the upper tube 42 of theseat 41 (as shown in FIG. 19); and a link element 68 (such as a steelrope), installed in the upper tube 42 of the seat 41, and having an endfixed to the press plate 63 and a spring 69 sheathed thereon, andanother end fixed to the slide member 67.

With the aforementioned structure, when the chair 4 is unfolded as shownin FIG. 16, the fixing member 62 is latched to the notch 641 of thelower joint 64 as shown in FIGS. 16, 18 and 19. If the user wants tofold the baby stroller, the user simply presses the press button 66 tolink and rotates the press plate 63 through the slide member 67 and thesteel rope 68. While the press plate 63 is rotating, the press plate 63pushes an oblique surface on a side of the fixing member 62 to move thefixing member 62 downward and separate it from the notch 641 of thelower joint 64. Now, the user turns the upper tube 42 of the seat 41downward, while turning the upper joint 61 to fold the chair 4 as shownin FIGS. 20 to 22, so that the baby stroller can be folded and storeddirectly without removing the chair 4, so as to reduce the length (orheight) of the baby stroller into half

The chair 4 includes left and right folding joints 6 that can beoperated independently, so that users must operate both folding joints 6at the same time for the operation to prevent a misuse by accident.

If the user does not apply forces to the press button 66, the fixingmember 62 and the press plate 63 are rotated back to their originalpositions by the tension released from the spring 621. Now, the uppertube 42 of the seat 41 is lifted and unfolded, and the fixing member 62will be latched to the notch 641 of the lower joint 64 automatically tounfold and position the chair 4 back to its original position as shownin FIG. 16.

With reference to FIGS. 23 to 25 for a folding joint of anotherpreferred embodiment of the present invention, the folding joint 7comprises: an upper joint 71, fixed to the bottom of the upper tube 42of the seat 41, and having a notch 711 formed on an external side of theupper joint 7; a fixing member 72, installed in the notch 711 through aspring 73, such that the fixing member 72 is always maintained at anoutwardly rotated state; a lower joint 74, fixed to an upper end of thelower tube 43 of the seat 41, and having two corresponding positioningslots 741 formed on an internal sides of the lower joint 74, and theupper and lower joints 71, 74 can be passed and coupled by a fixingelement 75 (such as a rivet) to position the fixing member 72 therein; apress button 76, installed on an external side at the middle of an upperend of the upper tube 42 of the seat 41, and having a slide member 77installed at the bottom of the press button 76; a link element 78 (suchas a steel rope), installed in the upper tube 42 of the seat 41, andhaving an end fixed to the fixing member 72, and another end fixed tothe slide member 77; and an adjusting screw 79, screwed to the slidemember 77, for adjusting the length of the steel rope 78.

When the chair 4 is unfolded, the fixing member 72 is engaged with apositioning slot 741 of the lower joint 74. If the user wants to foldthe baby stroller, the user simply presses the press button 76, suchthat the slide slot 77 and the steel rope 78 pull the fixing member 72to rotate, and the fixing member 72 moves inwardly to detach itsconnection with the positioning slot 741 of the lower joint 74, and thenthe upper tube 42 of the seat 41 is turned to fold the chair 4 as shownin FIGS. 22, 26 and 27, so as to reduce the length (or height) into halfOn the other hand, if the user does not apply forces to the press button76, the fixing member 72 will be pushed to turn to its original positionby the tension of the spring 73, and then the upper tube 42 of the seat41 is turned to latch the fixing member 72 into the positioning slot 741of the lower joint 74 in order to unfold and position the chair 4 asshown in FIGS. 16, 24 and 25, and achieve the same effect of theaforementioned preferred embodiment.

In summation of the description above, the present invention achievesthe expected objectives and effects and complies with the patentapplication requirements, and is thus duly filed for patent application.

1. A baby stroller comprising an independent stroller frame and a chair,wherein the independent stroller frame comprises a rotatable base,wherein the rotatable base abuts and positions the stroller frameautomatically when the stroller frame and the chair are unfolded and thechair is rotated together with the rotatable base when the strollerframe and the chair are folded, with the chair folded and positionedtogether with the stroller frame directly.
 2. The baby stroller of claim1, wherein the rotatable base has a positioning element installed on anexternal side at an upper end of the base.
 3. The baby stroller of claim1, wherein the stroller frame includes a joint, wherein the jointcomprises: two joint covers secured by a fixing element; an upper linkplate coupled to an upper tube of the stroller frame, with the upperlink plate having a bump; and a lower link plate coupled to a lower tubeof the stroller frame, with the lower link plate having a stop body. 4.A baby stroller comprising a stroller frame and a chair, wherein thechair comprises a fabric seat, upper and lower tubes mounted onto theseat, and a folding unit installed between the seat and the upper andlower tubes.
 5. The baby stroller of claim 4, wherein the folding jointunit comprises: an upper joint fixed to a bottom of the upper tube ofthe seat, with the upper joint having a notch formed on an external sideof the upper joint; a fixing member installed into the notch of theupper joint through a spring; a press plate having a breachcorresponding to the fixing member; a lower joint fixed at an upper endof the lower tube of the seat, with the lower joint having a positioningslot formed on an internal side of the lower joint and corresponding tothe fixing member; a press button installed on an external side at theupper tube of the seat, with the press button having a slide membercoupled to the bottom of the press button; and a link element installedin the upper tube of the seat, with the link element having an end fixedto the press plate and with a spring sheathed thereon, and havinganother end fixed to the slide member.
 6. The baby stroller of claim 4,wherein the folding unit comprises: an upper joint fixed to a bottom ofthe upper tube of the seat, with the upper joint having a notch formedon an external side of the upper joint; a fixing member installed intothe notch through a spring; a lower joint fixed at an upper end of thelower tube of the seat, with the lower joint having an positioning slotformed on an internal side of the lower joint and corresponding to thefixing member; a press button installed on an external side of the uppertube of the seat, with the press button having a slide member installedat a bottom of the press button; and a link element installed in theupper tube of the seat, with the link element having an end fixed to thefixing member and having another end fixed to the slide member.
 7. Ababy stroller, comprising: a stroller frame, wherein the stroller framecomprises a joint and a rotatable base rotatably connected to the joint,wherein the rotatable base comprises a connector; a stroller seat frame,wherein the stroller seat frame comprises upper and lower tubes, a seatfolding joint connected to both the upper tube and the lower tube, and aseat latch removably connecting the stroller seat frame to theconnector, wherein the rotatable base is retained in a fixed positionrelative to the stroller frame in an unfolded position and the rotatablebase rotates relative to the stroller frame in a folded state.
 8. Thebaby stroller of claim 7, wherein the connector is connected to thejoint.
 9. The baby stroller of claim 7, wherein the rotatable base abutsand positions the stroller frame when the stroller frame is in theunfolded position.
 10. The baby stroller of claim 7, wherein thestroller seat frame rotates with the rotatable base when the seat latchis removably connected to the connector.
 11. The baby stroller of claim7, wherein the rotatable base has a positioning element on an externalside at an upper end of the rotatable base.
 12. The baby stroller ofclaim 7, wherein the seat folding joint comprises: two joint coverssecured by a fixing element; an upper link plate coupled to an uppertube of the stroller frame, with the upper link plate having a bump; anda lower link plate coupled to a lower tube of the stroller frame, withthe lower link plate having a stop body.
 13. The baby stroller of claim12, wherein the rotatable base is rotatably connected to the joint bythe fixing element.
 14. The baby stroller of claim 13, wherein thefixing element is a bolt.
 15. A baby stroller comprising: a strollerframe; and a chair, wherein the chair comprises a fabric seat, upper andlower tubes mounted onto the fabric seat, and a folding joint connectedbetween the upper and lower tubes, wherein the folding joint retains thechair in a folded position wherein the upper tube is substantiallyparallel to the lower tube.
 16. The baby stroller of claim 15, whereinthe folding joint comprises: an upper joint fixed to a bottom of theupper tube of the seat, with the upper joint having a notch formed on anexternal side of the upper joint; a fixing member installed into thenotch of the upper joint through a spring; a press plate having a breachcorresponding to the fixing member; a lower joint fixed at an upper endof the lower tube of the seat, with the lower joint having a positioningslot formed on an internal side of the lower joint and corresponding tothe fixing member; a press button installed on an external side at theupper tube of the seat, with the press button having a slide membercoupled to a bottom of the press button; and a link element installed inthe upper tube of the seat, with the link element having an end fixed tothe press plate with a spring sheathed thereon and having another endfixed to the slide member.
 17. The baby stroller of claim 15, furthercomprising a foot rest folding joint.
 18. The baby stroller of claim 15,wherein the folding joint comprises an upper joint and a lower jointpositioning the upper frame and lower frame in a substantially linearunfolded position.